diseases, stupid people???
old possessions?
Peak and top because crest means the top of mountain or hill
Answer:
railway cottages" are small workers' houses, originally built by railway companies for their employees (most likely in Victorian times). They tend to be near railway stations (but not in them) and railway lines, not surprisingly, and may even have a street address such as "3 Railway Cottages". They will all have been sold off on the private market, in most cases a long time ago, or bought up as social housing by local governments, so anyone may now live in them.
Explanation:
